Two vectors have equal magnitude,and their scalar product is one-third the square of their magnitud
问题描述：
Two vectors have equal magnitude,and their scalar product is one-third the square of their magnitud
答
The question is not complete,I guess it was asking for the angle between the 2 vectors:
scalar product = a^2/3 = a*a*cosθ = a^2cosθ
cosθ = 1/3
θ = 70.52°